S&P TD-350/125 SILENT Silent In-Line Circular Duct Fan

The S&P TD-350/125 SILENT is a fan from the TD SILENT series for Ø125 mm ducts. It delivers up to 330 m³/h and runs at 23 dB at 3 m.

Capacity table

Max. airflow

330 m³/h

Sound level

23 dB

Duct size (Ø)

125 mm

Airflow values are the maximum flow rates in the manufacturer's price list. Noise values are casing-radiated sound at 3 metres. Duct size is taken from the model name.

Specifications

Brand: S&P
Series: TD SILENT
Type: Circular in-line, mixed flow
Casing: Plastic (Ø100 – Ø200), metal (Ø250, Ø315)
Noise: Built-in silencer; 23 – 39 dB (at 3 m)
Protection: Motor overload protection
Speed control: REB-1 N / REB-2,5 N speed controller; REGUL-2 or INTER 4P step switch
Models: 8 models (180 – 1,770 m³/h)

All models in the TD SILENT series

S&P TD SILENT · Capacity table
Model	Max. airflow (m³/h)	Sound level (dB)	Duct size (Ø) (mm)
TD-160/100 N SILENT	180	24	100
TD-250/100 SILENT	250	25	100
TD-350/125 SILENTthis model	330	23	125
TD-500/150-160 SILENT 3V	550	27	150
TD-800/200 SILENT 3V	910	28	200
TD-1000/200 SILENT 3V	1,040	29	200
TD-1300/250 SILENT 3V	1,320	36	250
TD-2000/315 SILENT 3V	1,770	39	315

Data date: 2026-09-24.

Compatible accessories

REB-1 NElectronic speed controller (1 A)
REB-2,5 NElectronic speed controller (2.5 A)
REGUL-22-step speed switch
INTER 4P3-step speed switch (for 3V models)

Frequently asked questions

What is the airflow of the TD-350/125 SILENT?

The TD-350/125 SILENT delivers up to 330 m³/h and connects to Ø125 mm ducts. Its sound level is 23 dB at 3 metres.

How is the speed of the TD-350/125 SILENT adjusted?

Speed is adjusted steplessly with the REB-1 N electronic speed controller or in steps with the REGUL-2 switch.

How do I get a price quote for the TD-350/125 SILENT?

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